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| 0000811589-21-000006-index.html | 2021-02-26 11:10:02 | |
| 0000811589-21-000006.txt | 2021-02-26 11:10:02 | |
 0000811589-21-000006-xbrl.zip | 797928 | 2021-02-26 11:10:02 |
| exhibit-annualincentiveplan.htm | 58725 | 2021-02-26 11:10:02 |
| exhibit21-listofsubsidiari.htm | 10360 | 2021-02-26 11:10:02 |
| exhibit231-consentofindepe.htm | 2526 | 2021-02-26 11:10:02 |
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| report.css | 2768 | 2021-02-26 11:10:02 |
| Show.js | 1086 | 2021-02-26 11:10:02 |